Improvement in standard jack-posts for drilling and pumping machinery



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. N0 V142,619I Patented Septemb@r9,1f373I useful Improvements" in Standard Jack-Posts UNITED STATES ATENT OFFICE.

WILLIAM W. EASTMAN AND WILLIAM H. H. MORRIS, OF MEADVILLE, PA.

IMPROVEMENT IN STANDARD JACK-POSTSA FOR DRILLING AND PUIVIPING- MACHINERY'.

Specication forming part of Letters Patent No. 142,619, dated September 9, 1873; application filed May 27, 1873.

To all 'whom it may concern:

Be it known that we, WILLIAM W. EAsT- MAN and WILLIAM H. H. MORRIS, of Meadville, in the county of Crawford and State of Pennsylvania, have invented certain new and for Drilling and Pumping in Oil-Well Machinery, &c. and the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings making a part of this specification, in Which- Figure 1 represents a plan or top view of the improvement, showing the base or mnd sill, tension-braces, socket-cap, and journal-box combined. Fig. 2 shows a side elevation of the post or standard as it is secured to the mud-si1l, with the socket-cap, journal-box, side vertical bolt rods, and tension buckle -joint braces. Fig. 3 shows a sectional crossview of the same.

` Our invention relates to what is technically termed a jack-post,for bulLWheels for drilling and pumping oil-wells; and it consists in the form and construction of the socketcap and journal-box combined, and themanner of securing the same to the standard, or post of heavy timber of A any required length, so that the band-wheel may be elevated to work at any desired height and the post maintain its stiiness, and remain as 'rigid as when low down or near the mud-sill.

To enable others to make and use our invention, we will describe it more fully, referring to the drawings and to the letters marked thereon.

The timbers, which consist of the mud-sill A and post or standard B, for jack-posts for supporting the journal-boxes C on which the band- Wheel runs for drilling and pumping oil-Wells, require to be very large and stron g, and braced and otherwise secured in a rm and substantial manner, and even then they soonbecome shaky from the great weight and high rate 0I speed they are required to run. The jack-posts also require to be of different height, according to the different sizes of the band-wheels used and the position they have to be placed in to operate. The journal-box C is made of cast metal, and is covered by a cap, D, which is secured by bolts and nuts d d, in the usual manner. It is also provided with a square or oblong cavity, b b, on its under side, into which the top of the standard B is firmly fitted. The

socket G has ears e e cast thereon in line with the journal, through which vertical rod-bolts E E are inserted parallel with the post on both sides, to secure it firmly down on the mud-sill A bynuts c c let into mortises made in the sides of the sill. The standard B is rmly braced the other way by bolt-rods F F passing through the mud-sillA at any desired distance from the Abase of the post, they being provided with screw-buckles G G, and are connected with the cap-socketjournalbox C at the top, so that any slack caused by the jarring can be taken up, and a tension on the rods sufficient to brace the post very firmly.

What we claim as our invention is- An extension jack post provided with a socket-cap and journalbox combined, and the manner of securing the same to the vertical standard B and holding and bracing the same' by the rodbolts E E and tension rods F F, substantially as shown and described, for the purposes herein set forth.

' WILLIAM WV. EAS'IMAN. W. H. H. MORRIS. Witnesses:

SAMUEL GRAY, C. A. EAsTMAN. 

